Plasma cleaning & plasma surface modification
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Quality assurance test equipment
For our quality assurance and to support our process development as well as the materials processing contracts various test methods and
measurement techniques are employed
to ensure we comply with the relevant standards and customer specifications.
Measurement Systems and test methods.
Tensile testing machineTensile testing machines are used to determine material characteristics and the production of
tensile strength and elongation diagrams. Various stretch, compression and bending
tests enable us to assess the effects on parts or materials such as polymers or elastomers.
Additionally, we can assess which effectiveness. Plasma activation or plasma priming has on
improving the adhesive bond strengths or paint adhesion.
MicroscopeFor the inspection of plasma modified surfaces. With the light microscope changes in
the structure after plasma treating can be observed.
After plasma treatments to improve bonding the break in the joint can be assessed
after destructive testing. To observe if the failure was cohesive or adhesive for example
Surface hardness tester
Used to test the scratch resistance and abrasion resistance from parts and materials.
Testing to DIN 55656:2014-12 by sliding a point with a defined loading across the surface
of the test piece where the depth of the scratch in the surface indicates the surface hardness.
With this test method we can assess the improvement achieved by plasma coating
or surface modification.
An infrared cameras gives the intensity of the Infra-red over the surface
of the work piece. This corresponds to the temperature.
Plasma transmits energy and hence warmth to the work piece thus we can
get a visual record of homogenate from the warming from plasma.
Spectrum analyzer (plasma analyzer)
By analyzing the changes in color during the process or the color of the plasma
it is possible to monitor the process on a continuous basis and detect changes.
This makes it possible to optimize the process by examining the resulting data.
Contact angle meter
To determine the surface energy of a material a small amount of fluid is applied to the
surface of the work piece. The steepness of the angle of the drop surface is measured.
This indicates the ability of the fluid to wet the surface.
Many polymers have a very high contact angle due to their low surface energy.
This indicates they will be difficult or impossible to print, bond or paint.
After plasma activation the contact angle is normally flat indicating the workpiece can
be printed, bonded or painted without problem.
A German term for paint repelling surfaces.
The paint pearls away from the surface due to surface contamination.
Often referred to as orange peel effect.
All traces of substances such as silicones must be removed.
Plasma cleaning is especially effective for this application, especially in small
angles and gaps that fluid cleaners may not reach.
The LABS test offers evidence that the plasma cleaning was effective and the
parts can be painted without problem.
With specified solvents the offending substances are dissolved from the surface,
extracted and then coated on to a defined surface. This is then painted after drying.
The resulting surface is examined for problems. We carry out these tests in
accordance to PV 3.10.7, VDMA 24364 or customer specific specifications.
Cross cut test
Standard test for determining the adhesion of paint to a substrate as detailed in DIN EN ISO 2409
or ASTM D3359-02.
A standard tool is used to make 6 cuts that penetrate through the paint to the surface of the test
piece at right angles to form a grid pattern.
Particles are then removed with a soft brush.
An adhesive tape is then applied to the grid and quickly pulled off. The amount of paint removed
from the surface and adhering to the tape is assed and compared to the specification or used to
determine the improvement after plasma treating.